Statistical Methods for Psychology 
Howell,David C. 
 - 6th ed. 
 - Australia  Thomson/Wadsworth  2007 
 - xxi,739 p:  ill;  27 cm 
<br/><br/><label>ISBN: </label>9780495012870 
<br/><br/><label>LC Class. No.: </label>BF 39  / .H69 2007